January 31 » Czechoslav Trade Union Association is founded in Prague.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
June 22 » British colonial officers Charles Walter Rand and Lt. Charles Egerton Ayerst are assassinated in Pune, Maharashtra, India by the Chapekar brothers and Mahadeo Vinayak Ranade, who are later caught and hanged.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
December 30 » The British Colony of Natal annexes Zululand.
Day of death July 30, 1912
The temperature on July 30, 1912 was between 12.6 °C and 19.3 °C and averaged 15.4 °C. There was 0.8 mm of rain. There was 3.8 hours of sunshine (24%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
January 5 » The 6th All-Russian Conference of the Russian Social Democratic Labour Party (Prague Party Conference) opens. In the course of the conference, Vladimir Lenin and his supporters break from the rest of the party to form the Bolshevik movement.
January 17 » British polar explorer Captain Robert Falcon Scott reaches the South Pole, one month after Roald Amundsen.
February 25 » Marie-Adélaïde, the eldest of six daughters of Guillaume IV, becomes the first reigning Grand Duchess of Luxembourg.
May 13 » The Royal Flying Corps, the forerunner of the Royal Air Force, is established in the United Kingdom.
October 7 » The Helsinki Stock Exchange sees its first transaction.
December 16 » First Balkan War: The Royal Hellenic Navy defeats the Ottoman Navy at the Battle of Elli.
When copying data from this family tree, please include a reference to the origin: Johanna Lodewijks, "Family tree Dusseljee", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-dusseljee/I5498.php : accessed January 30, 2026), "Derkina Lammerts (1897-1912)".
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